1  /* Internal function for converting integers to ASCII.
       2     Copyright (C) 1994,95,96,97,98,99,2002,2003 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, write to the Free
      17     Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
      18     02111-1307 USA.  */
      19  
      20  #ifndef _ITOWA_H
      21  #define _ITOWA_H	1
      22  
      23  /* Convert VALUE into ASCII in base BASE (2..16).
      24     Write backwards starting the character just before BUFLIM.
      25     Return the address of the first (left-to-right) character in the number.
      26     Use upper case letters iff UPPER_CASE is nonzero.  */
      27  
      28  static const wchar_t _itowa_lower_digits[16] = L_("0123456789abcdef");
      29  static const wchar_t _itowa_upper_digits[16] = L_("0123456789ABCDEF");
      30  
      31  static inline wchar_t *
      32  __attribute__ ((unused, always_inline))
      33  _itowa_word (unsigned long value, wchar_t *buflim,
      34  	     unsigned int base, int upper_case)
      35  {
      36    const wchar_t *digits = (upper_case
      37  			   ? _itowa_upper_digits : _itowa_lower_digits);
      38    wchar_t *bp = buflim;
      39  
      40    switch (base)
      41      {
      42  #define SPECIAL(Base)							      \
      43      case Base:								      \
      44        do								      \
      45  	*--bp = digits[value % Base];					      \
      46        while ((value /= Base) != 0);					      \
      47        break
      48  
      49        SPECIAL (10);
      50        SPECIAL (16);
      51        SPECIAL (8);
      52      default:
      53        do
      54  	*--bp = digits[value % base];
      55        while ((value /= base) != 0);
      56      }
      57    return bp;
      58  }
      59  
      60  static inline wchar_t *
      61  __attribute__ ((unused, always_inline))
      62  _itowa (uint64_t value, wchar_t *buflim,
      63  	unsigned int base, int upper_case)
      64  {
      65    const wchar_t *digits = (upper_case
      66  			   ? _itowa_upper_digits : _itowa_lower_digits);
      67    wchar_t *bp = buflim;
      68  
      69    switch (base)
      70      {
      71        SPECIAL (10);
      72        SPECIAL (16);
      73        SPECIAL (8);
      74      default:
      75        do
      76  	*--bp = digits[value % base];
      77        while ((value /= base) != 0);
      78      }
      79    return bp;
      80  }
      81  #undef SPECIAL
      82  
      83  #endif	/* itowa.h */